安徽建筑工业学院毕业设计（论文）50万吨/年甲醇精馏工段及加压塔冷却器设计50万吨/年甲醇精馏工段及加压塔冷却器设计摘要本文对甲醇精馏双塔工艺、三塔工艺、四塔工艺和五塔工艺进行了简要的介绍，通过对不同工艺的对比显示出五塔工艺的优越性。新型五塔工艺在四塔工艺高压塔后面加了个中压塔，可在高压塔底部和中压塔顶部与中压塔顶部和常压塔底部实现高效热集成，并用加压塔底部废热作为回收塔热源，节约能源。通过本课题的设计了解甲醇精馏的发展历程和国内外的研究现状，熟悉甲醇精馏工艺流程、技术设备等。应用aspen对五塔流程全程进行了初步的物料衡算，并且对加压塔甲醇冷却器进行了初步的设计。最后绘制出五塔工艺的PFD图、加压塔PID图、设备图和设备布置图。关键词：甲醇精馏多效精馏AspenPlus流程模拟AbstractThispaperdescribedtwocolumnsdistillationprocess,threecolumnsdistillationprocess,fourcolumnsdistillationprocessandfivedistillationprocessinmethanolrectificationtechnology,showedtheadvantageofthefivecolumnsrectificationprocess.Thenewfive-columnschemeaddsamedium-pressurecolumnaftertheoriginalhigher-pressurecolumn.Thefive-columnarrangementcreatesamulti-effectdistillationconfigurationinvolvingefficientheatintegrationbetweenhigher-pressureandmedium-pressurecolumnsandmedium-pressureandatmosphericcolumns.Andusedthewasteheatatthebottomofhigher-pressureasrecoverycolumn'ssourceofheat,whichisenergy-saving.Understandingofthisissuethroughthedesigndevelopmentprocessandthemethanoldistillationresearchstatusathomeandabroad,familiarwiththemethanoldistillationprocess,andtechnicalequipment.Theaspensoftwareisappliedtoapreliminarybalanceoffivecolumn.Makingapreliminarydesignforthecondenserofhiger-pressurecolumn.Finallydrawtheprocessflowchart,flowchartwithacontrolpointofmaterials,equipmentlayoutdrawingsandequipment.Keywords：MethanolDistillationMulti-effectdistillationAspenPlusprocesssimulationTOC\o"1-3"\h\z\uHYPERLINK\l_Toc31272第一章综述PAGEREF_Toc312725HYPERLINK\l_Toc27381.1概述PAGEREF_Toc27385HYPERLINK\l_Toc131361.1.1甲醇的性质及用途PAGEREF_Toc131365HYPERLINK\l_Toc54931.1.2甲醇的用途PAGEREF_Toc54935HYPERLINK\l_Toc232891.1.3国内甲醇的工业现状和发展前景PAGEREF_Toc232897HYPERLINK\l_Toc17351.1.4国内外甲醇生产工艺技术PAGEREF_Toc17358HYPERLINK\l_Toc35211.1.5粗甲醇的组成PAGEREF_Toc352113HYPERLINK\l_Toc69961.2工艺流程选择PAGEREF_Toc699614HYPERLINK\l_Toc15411.2.1普通双塔流程PAGEREF_Toc154115